Shortcode show_author="false"

There are two parameters that are not working. ( show_author=”false” and read_more_text=”Leia Mais”)
As you can see in the link: http://tribuna.litoralarte.com.br/

Parameters I’m using: [recent_post_slider limit=”4″ design=”design-3″ show_author=”false” show_content=”true” show_date=”true” dots=”true” arrows=”true” autoplay=”true” autoplay_interval=”5000″ speed=”1000″ content_words_limit=”25″ post_type=”post” show_read_more=”true” read_more_text=”Leia Mais”]